Datafiles

  • Twins_by_year_2018 Download .TXT file Open in Data Desk ?
  • Methods: Correlation, Inference, Re-expression, Regression
  • Source: www.cdc.gov/nchs/births.htm
  • Number of Cases: 39
  • Excerpt: In January 2012, the New York Times published a story called “Twin Births in the U.S., Like Never Before,” in which they reported a 76 percent increase in the rate of twin births from 1980 to 2009. The dataset gives the number of twin births each year (per 1000 live births). Can you confirm the […]








  • Used_cars_2014 Download .TXT file Open in Data Desk ?
  • Methods: R-squared, Regression, Residuals
  • Source: Carmax.com search for Toyota Corollas for sale within 250 radius of Redlands, CA in 2014
  • Number of Cases: 13
  • Excerpt: How does the age of a used car influence its price? This is a small enough data set to find a model with a calculator.


  • Used_Civics_2017 Download .TXT file Open in Data Desk ?
  • Methods: Correlation, Regression, Scatterplot
  • Source: www.autotrader.comaccessed on 22 Jan 2017 with a search for Honda Civics for sale by owner.
  • Number of Cases: 55
  • Excerpt: The web site www.autotrader.com lists cars for sale. On January 22 2017, it listed 55 used Honda Civics for sale by owner. From those listings, we extracted the asking price ($), the mileage, and the model year (from which we computed the age of the car at the time the data were collected Questions include […]


  • Used_CIvics_2020 Download .TXT file Open in Data Desk ?
  • Methods: Multiple Regression Inference, Regression Inference
  • Source: www.autotrader.com accessed on 22 Jan 2017 with a search for Honda Civics for sale by owner.
  • Number of Cases: 55
  • Excerpt: The web site www.autotrader.com lists cars for sale. On January 22 2017, it listed 55 used Honda Civics for sale by owner. From those listings, we extracted the asking price ($), the mileage, and the model year (from which we computed the age of the car at the time the data were collected Questions include […]




  • USGDP 2024 Download .TXT file Open in Data Desk ?
  • Methods:
  • Source: The data give the gross domestic product (GDP) of the United States in trillions of 2012 dollars and time.
  • Number of Cases: 96
  • Excerpt: The gross domestic product (GDP) of the United States in trillions of 2012 dollars and time.


  • USGDP_2016 Download .TXT file Open in Data Desk ?
  • Methods: Regression
  • Source: http://www.multpl.com/us-gdp-inflation-adjusted/table
  • Number of Cases: 67
  • Excerpt: The data give the gross domestic product (GDP) of the United States in trillions of 2009 dollars and time.


  • USGDP_2020 Download .TXT file Open in Data Desk ?
  • Methods: Outliers, Re-expression, Regression, Residuals
  • Source: http://www.multpl.com/us-gdp-inflation-adjusted/table
  • Number of Cases: 71
  • Excerpt: 9The data give the gross domestic product (GDP) of the United States in trillions of 2012 dollars and time.


  • Vehicle_weights Download .TXT file Open in Data Desk ?
  • Methods: Blocking, Correlation, Paired Data, Re-expression, Regression, Scatterplot
  • Source: The Minnesota Department of Transportation
  • Number of Cases: 10
  • Excerpt: The Minnesota Department of Transportation hoped that they could measure the weights of big trucks without actually stopping the vehicles by using a newly developed “weight-in-motion” scale. To see if the new device was accurate, they conducted a calibration test. They weighed several stopped trucks (Static Weight) and assumed that this weight was correct. Then […]